docs: clean up rpc pages and bridge node guide

## Issue

When attempting to launch a Mocha bridge node, the process failed because some of the listed RPC providers are pruned, and the node required an archival RPC.

## Problem

The current RPC lists are confusing and do not clearly indicate which providers are pruned versus archival. As a result, it’s difficult to know which RPC to use for launching different types of nodes.

## Proposed Solution

- [ ] 1. Clarify RPC lists — Explicitly label which providers are archival and which are pruned.
- [ ] 2. Improve guides — Update node launch guides to clearly specify the type of endpoint (pruned vs. archival) required.
- [ ] 3. Expand documentation — Add clear instructions for launching both pruned (regular) and archival nodes, including which RPC type is needed for each case.